js如何将多个数组实现排列组合
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<html><head> <title>js两个数组排列组合</title> <script type="text/javascript"> var a = ["A","B","C"]; var b = ["1", "2","3"]; window.onload = function () { var a1 = new objPL(a);//计算数组a的排列组合 var b1 = new objPL(b);//计算数组b的排列组合 var str = ""; var n = 0; //a1和b1的排列组合个数就是两者相乘（双层循环） for (var i = 0; i < a1.length; i++) { for (var j = 0; j < b1.length; j++) { str += a1[i] + b1[j] + " "; n++; } str += "<br/>"; } document.write("共" + n + "个<br/>"); document.write(str); } //取数组的排列组合 function objPL(arr) { this.a = arr; this.r = []; this.n = 0; //从M个数里面取N个(递归) this.mGetN = function (curIndex, num, curSelect) { if (num == 0) { this.r[this.n++] = curSelect; return; } if (this.a.length - curIndex < num) return; this.mGetN(curIndex + 1, num - 1, curSelect + this.a[curIndex]); this.mGetN(curIndex + 1, num, curSelect); } for (var i = 1; i <= this.a.length; i++) { this.mGetN(0, i, ""); } return this.r; } </script></head><body></body></html>
["A","B","C"]与["1","2","3"]组合的结果：
["A","B","C"]与["1","2","3"]组合的结果：
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